Examples of org.apache.avro.io.BinaryEncoder

org.apache.avro.io.BinaryEncoder
Low-level support for serializing Avro values. This class has two types of methods. One type of methods support the writing of leaf values (for example, {@link #writeLong} and{@link #writeString}). These methods have analogs in {@link Decoder}. The other type of methods support the writing of maps and arrays. These methods are {@link #writeArrayStart}, {@link #startItem}, and {@link #writeArrayEnd} (and similar methods formaps). Some implementations of {@link Encoder} handle thebuffering required to break large maps and arrays into blocks, which is necessary for applications that want to do streaming. (See {@link #writeArrayStart} for details on these methods.) @see Decoder

        }
    }


    public byte[] toBytes(T object) {
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        Encoder encoder = new BinaryEncoder(output);
        SpecificDatumWriter<T> datumWriter = null;
        try {
            datumWriter = new SpecificDatumWriter<T>(clazz);
            datumWriter.write(object, encoder);
            encoder.flush();
        } catch(IOException e) {
            throw new SerializationException(e);
        } finally {
            SerializationUtils.close(output);
        }

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        typeDef = Schema.parse(schema);
    }


    public byte[] toBytes(Object object) {
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        Encoder encoder = new BinaryEncoder(output);
        GenericDatumWriter<Object> datumWriter = null;
        try {
            datumWriter = new GenericDatumWriter<Object>(typeDef);
            datumWriter.write(object, encoder);
            encoder.flush();
        } catch(IOException e) {
            throw new SerializationException(e);
        } finally {
            SerializationUtils.close(output);
        }

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        }
    }


    public byte[] toBytes(T object) {
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        Encoder encoder = new BinaryEncoder(output);
        ReflectDatumWriter<T> datumWriter = null;
        try {
            datumWriter = new ReflectDatumWriter<T>(clazz);
            datumWriter.write(object, encoder);
            encoder.flush();
        } catch(IOException e) {
            throw new SerializationException(e);
        } finally {
            SerializationUtils.close(output);
        }

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    }


    public byte[] toBytes(Object object) {
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        Encoder encoder = new BinaryEncoder(output);
        GenericDatumWriter<Object> datumWriter = null;


        output.write(newestVersion.byteValue());
        try {
            datumWriter = new GenericDatumWriter<Object>(typeDef);
            datumWriter.write(object, encoder);
            encoder.flush();
        } catch(SerializationException sE) {
            throw sE;
        } catch(IOException e) {
            throw new SerializationException(e);
        } catch(Exception aIOBE) {

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     * serialize those objects without an exception
     */
    private byte[] toBytes(Object object, Schema writer, Integer writerVersion) {


        ByteArrayOutputStream output = new ByteArrayOutputStream();
        Encoder encoder = new BinaryEncoder(output);
        GenericDatumWriter<Object> datumWriter = null;


        output.write(writerVersion.byteValue());
        try {
            datumWriter = new GenericDatumWriter<Object>(writer);
            datumWriter.write(object, encoder);
            encoder.flush();
        } catch(IOException e) {
            throw new SerializationException(e);
        } catch(SerializationException sE) {
            throw sE;
        } finally {

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    checkReadWrite(object, ReflectData.get().getSchema(object.getClass()));
  }
  void checkReadWrite(Object object, Schema s) throws Exception {
    ReflectDatumWriter<Object> writer = new ReflectDatumWriter<Object>(s);
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    writer.write(object, new BinaryEncoder(out));
    ReflectDatumReader<Object> reader = new ReflectDatumReader<Object>(s);
    Object after =
      reader.read(null, DecoderFactory.defaultFactory().createBinaryDecoder(
          out.toByteArray(), null));
    assertEquals(object, after);

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      new ReflectDatumWriter<SampleRecord>(schm);
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    SampleRecord record = new SampleRecord();
    record.x = 5;
    record.y = 10;
    writer.write(record, new BinaryEncoder(out));
    ReflectDatumReader<SampleRecord> reader = 
      new ReflectDatumReader<SampleRecord>(schm);
    SampleRecord decoded =
      reader.read(null, DecoderFactory.defaultFactory().createBinaryDecoder(
          out.toByteArray(), null));

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    Schema schm = reflectData.getSchema(AnotherSampleRecord.class);
    ReflectDatumWriter<AnotherSampleRecord> writer = 
      new ReflectDatumWriter<AnotherSampleRecord>(schm);
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    // keep record.a null and see if that works
    BinaryEncoder e = new BinaryEncoder(out);
    AnotherSampleRecord a = new AnotherSampleRecord();
    writer.write(a, e);
    AnotherSampleRecord b = new AnotherSampleRecord(10);
    writer.write(b, e);
    e.flush();
    ReflectDatumReader<AnotherSampleRecord> reader = 
      new ReflectDatumReader<AnotherSampleRecord>(schm);
    ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
    Decoder d = DecoderFactory.defaultFactory().createBinaryDecoder(in, null);
    AnotherSampleRecord decoded = reader.read(null, d);

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     */
    public List<ByteBuffer> getBytes() 
      throws Exception {
      if (requestBytes == null) {
        ByteBufferOutputStream bbo = new ByteBufferOutputStream();
        BinaryEncoder out = ENCODER_FACTORY.binaryEncoder(bbo, encoder);


        // use local protocol to write request
        Message m = getMessage();
        context.setMessage(m);


        writeRequest(m.getRequest(), request, out); // write request payload


        out.flush();
        List<ByteBuffer> payload = bbo.getBufferList();


        writeHandshake(out);                     // prepend handshake if needed


        context.setRequestPayload(payload);
        for (RPCPlugin plugin : rpcMetaPlugins) {
          plugin.clientSendRequest(context);      // get meta-data from plugins
        }
        META_WRITER.write(context.requestCallMeta(), out);


        out.writeString(m.getName());             // write message name


        out.flush();
        bbo.append(payload);


        requestBytes = bbo.getBufferList();
      }
      return requestBytes;

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   */
  private Event makeEvent(GenericData.Record record, Schema schema) throws IOException {
    GenericDatumWriter<GenericRecord> datumWriter =
        new GenericDatumWriter<GenericRecord>(schema);
    ByteArrayOutputStream outBytes = new ByteArrayOutputStream();
    BinaryEncoder encoder = new BinaryEncoder(outBytes);


    datumWriter.write(record, encoder);
    return new EventImpl(outBytes.toByteArray());
  }

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